BLACK, George F. Scottish Charms and Amulets. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 27, p. 433–526, 1893. DOI: 10.9750/PSAS.027.433.526. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/6529. Acesso em: 5 may. 2024.